Chapter 21.1
Chapter 21.2
Chapter 21.3
21 Review
Chapter 22 Vocal
100
A system that is made up of the sun and all the planets in it
What is the solar system
100
The earth has ______ continents.
What is 7
100
The line of latitude runs _______
East to West
100
The earth has seven landmasses called_______
Continents
100
A deep, long valley on the ocean floor
A trench
200
a closed curved path
What is an orbit
200
A large landmass
What is a continent.
200
The ______is the middle layer of the earth.
What is the mantle
200
Melted rock formed in the Earth's mantle
What is magma
300
Most scientists think the earth was formed _______billion years ago.
What is 4.5
300
an imaginary line line that circles the Earth halfway between the North and South Poles
What is the equator
300
There are _____time zones that have been set up around the world.
What is 24
300
The_______ is the 0-degree line of longitude
What is the prime meridian
300
a process that breaks down rocks and minerals
What is weathering
400
The earth is the ________planet from the sun
What is third
400
The earth's surface is mostly covered by_______
What is water
400
The United Stated is divided into _____time zones
What is 4
400
How many days does it take for the earth to make a complete rotation?
365
400
A scientist who studies who studies rocks to learn about the history and structure of the Earth
What is a geologist
500
________is the strong pull that keeps all the planets and objects of the solar system in their orbits.
What is gravity.
500
The three layers of the earth are
What are the mantle, crust, and core.
500
Why are there 24 time zones in the world?
Because the Earth rotates 15 degrees of longitude in 1 hour (15X24=360)
500
On which layer of the earth do you live?
We live on the crust.
500
An opening in the Earth's surface that releases magma from the mantle.
What is a volcano
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